/* 1.公共属性样式  .xxx{} */

/* 版心 */
.container {
  width: 1200px;
  margin: 0 auto;
}

/* 测试工具 */
.bd {
  border: 1px solid red;
}

/* 浮动 */
.fl {
  float: left;
}

.fr {
  float: right;
}

.clearfix::after {
  content: "";
  height: 0;
  display: block;
  clear: both;
}

/* margin */
.mt18 {
  margin-top: 18px;
}

.mr30 {
  margin-right: 30px;
}

/* head */
.head {
  height: 66px;
  border-bottom: 1px solid #ccc;
  position: relative;
  z-index: 200;
  width: 100%;
  box-sizing: border-box;
}
.head-logo {
  padding-top: 12px;
  padding-left: 30px;
}

.head-login,
.head-register {
  /* float: left; */ /* 块级格式上下文 */
  border: 1px solid #ccc;
  padding: 4px 12px;
  border-radius: 30px;
  color: #fff;
}

.head-register {
  background-color: #ed510a;
  border: none;
  color: #fff;
}

.head-nav {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.head-nav li {
  float: left;
  margin: 0 20px;
  line-height: 64px;
}
.head-nav li a{
  color: #fff;
}
.head-nav .active {
  border-bottom: 2px solid white;
}

/* 页脚 */
.foot {
  background: #f8f8f8;
  padding-top: 40px;
  padding-bottom: 30px;
}
.foot-count{
  display: flex;
  justify-content: space-between;
  margin-bottom: 40px;
}
.foot ul{
  display: flex;
  justify-content: space-between;
}
.foot ul li{
  margin-right: 40px;
}
.foot ul h3{
  margin-bottom: 38px;
  color: #000;
  font-weight: inherit;
}
.foot ul a{
  line-height: 30px;
  color: #b3b3b3;
  font-size: 16px;
}
.foot-right h3{
  color: #000;
  margin-left: 26px;
}
.foot-right p{
  color: #b3b3b3;
  margin-top: 12px;
  margin-bottom: 34px;
  margin-left: 48px;
}
.foot-foot{
  display: flex;
  justify-content: space-between;
}
.foot-foot p{
  font-size: 18px;
}
.foot-foot img{
  margin-right: 5px;
}

/* 回到顶部 */

.retTop{
  position: fixed;
  border-radius: 50%;
  left: 50%;
  margin-left: 700px;
  bottom: 80px;
  width: 40px;
  height: 40px;
  background: url(../imgs/returntopicon.jpg) no-repeat repeat;
  background-position: -163px -56px;
  cursor: pointer;
  display: none;
}